Fabrication and characterization of antibacterial nanoparticles supported on hierarchical hybrid substrates

Karumuri, Anil Kumar; Maleszewski, Adam A.; Oswal, Dhawal Pravin; Hostetler, Heather A.; Mukhopadhyay, Sharmila M.

doi:10.1007/s11051-014-2346-x

Cited by 13 publications

(13 citation statements)

References 40 publications

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“…All samples show iron signal, remnants from the CVD process where iron nanoparticles (FeNP) catalyze CNT growth. These have been carefully measured and reported in an earlier study [11], indicating that most of the FeNPs in clean CNT growth conditions are confined inside the nanotubes and in the deeper regions of the CNT carpet, and hence do not interfere with the functionality of the AgNPs. Silicon signal increases with sol-gel silica deposition, as expected.…”

Section: Influence Of Cnt Functionalization On Agnp Distributionmentioning

confidence: 67%

“…CNTs offer several advantages as NP supports and several earlier studies have discussed the influence of the physical and chemical nature of various support structures on advanced applications [4]. The CNT-enhanced substrates reported by our group have proved to be useful for several applications such as nanocomposite formation [5], surface adsorption [6], cell scaffolding [7], thermal management materials [8] in addition to support for metallic NPs [9][10][11].…”

Section: Q1mentioning

confidence: 99%

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Silver nanoparticles supported on carbon nanotube carpets: influence of surface functionalization

et al. 2016

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The effectiveness of nanoparticle-based functional devices depends strongly on the surface morphology and area of the support. An emerging powerful approach of increasing the available surface area without decreasing strength or increasing bulk is to attach arrays of suitable nanotubes on the surface, and to attach the necessary nanoparticles to them. Earlier publications by this team have shown that carpet-like arrays of carbon nanotubes (CNT) can be successfully grown on a variety of larger carbon substrates such as graphite, foams and fabric, which offer hierarchical multiscale supporting architecture suitable for the attachment of silver nanoparticles (AgNPs). A limiting factor of pure CNT arrays in fluid-based applications is their hydrophobicity, which can reduce the percolation of an aqueous medium through individual nanotubes. Previous studies have demonstrated that the treatment of CNT carpets with dry (oxygen) plasma can induce reversible wettability, and treatment with wet (sol-gel) coating can impart permanent wettability. In this paper, we report the influence of such treatments on the attachment of AgNPs, and their effectiveness in water disinfection treatments. Both types of hydrophilic surface treatments show an increase in silver loading on the CNT carpets. Oxygenplasma treated surfaces (O-CNTs) show fine and densely packed AgNP, whereas silica-coated nanotubes (silica-CNTs) show uneven clusters of AgNPs. However, O-CNT surfaces lose their hydrophilicity during AgNP deposition, whereas silica-CNT surfaces remain hydrophilic. This difference significantly impacts the antibacterial effectiveness of these materials, as tested in simulated water containing Gram negative Escherichia coli (E. coli, JM109). AgNPs on silicacoated CNT substrates showed significantly higher reduction rates of E. coli compared to AgNPs on plasma-treated CNT substrates, despite the finer and better dispersed AgNP distribution in the latter. These results provide important insights into different aspects of surface modification approaches that can control the wettability of CNT carpets, and their applicability in water treatment applications.

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Section: Influence Of Cnt Functionalization On Agnp Distributionmentioning

confidence: 67%

Section: Q1mentioning

confidence: 99%

Silver nanoparticles supported on carbon nanotube carpets: influence of surface functionalization

et al. 2016

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“…Moreover, single miRNA may contribute to control specific differentiation processes as demonstrated by early research in worms for example, the control of lin-41 by let-7. Concernedly, miRNA also play a major role in stem cell differentiation and in persuading pluripotency where individuals miRNA clumps, miR-302, was currently revealed to be effective to create iPSC from both human and mouse embryonic cells [12]. Their contribution in differentiation and development of cellular affinity proceeds that reduction of miRNAs function might develop the increased cellular flexibility, de-differentiation and increased tendency for oncogenic modifications.…”

Section: Biological Role Of Mirnasmentioning

confidence: 99%

Circulating microRNAs in oncogenic viral infections: potential diagnostic biomarkers

2020

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Cancer is a leading cause of high death rate worldwide. One strategy to control the disease is the early diagnosis by novel biomarkers that express during early stage of the disease. The recent diagnostic strategies in cancer don't have enough specificity to promote the detection of cancer at its beginning. Many biomarkers like protein biomarkers and metabolites are being used for diagnosis of various cancer types but miRNAs are excellent among them, because they have distinctive biochemical characteristics. Moreover, to raise the precision and capability of miRNA to diagnose cancer, the analyzing of both miRNAs and as well as selective mRNA will help in creating a more complete categorizer. Virus constitutes the cause of 20% of entire human cancer cases and both RNA and DNA viruses are linked with tumors in both animal and man. Even though many viruses can cause different tumors in animals, only some of them are linked with human cancers and are presently regarded as oncogenic viruses. These viruses include Human Papillomavirus (HPV), Hepatitis B (HBV) and Hepatitis C Virus (HCV), Epstein Barr Virus (EBV), Human Herpes Virus 8 (HHV8), Human T cell Leukemia Virus (HTLV) and Merkel Cell Polyomavirus (MCPyV). Expression data of miRNA in several cancers reveal that miRNA profile is different in cancer cells as compared to normal cells. So, miRNA could be useful biomarker for the detection of cancer. The present study strengthens a foundation and gives a logic to investigate the ability of miRNAs as circulating biomarkers in various cancers.

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“…Tuan et al [10] presented a modified sono-electrodeposition technique for making non-toxic nanosilver colloids. Karumuri et al [11] discussed the coating of AgNP onto hierarchical structures fabricated by grafting carbon nanotubes to increase specific surface area. Richter et al [12] explained the design of lignin nanoparticles infused with silver ions and coated with a cationic polyelectrolyte layer, which is a biodegradable and environmentally friendly alternative to silver nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Coating of Porous Activated Carbons with Silver Nanoparticles and its Scale-up Design for Plant Disease Management in Greenhouses

Savchenko¹,

Chen²,

Hao³

et al. 2016

J Plant Pathol Microbiol

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Recently, several promising reports on using silver nanoparticles (AgNPs) against plant pathogenic fungi have been published. Jo et al. [13] and Kim et al. [14] showed various forms of silver ions and nanoparticles in killing two plant-pathogenic fungi: Bipolaris sorokiniana and Magnaporthe grisea, Raffaelea sp., and the other eight plant pathogenic fungi [15], respectively. Lamsal et al. [16] demonstrated in field tests, silver nanoparticles of 100 ppm reach the

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Fabrication and characterization of antibacterial nanoparticles supported on hierarchical hybrid substrates

Cited by 13 publications

References 40 publications

Silver nanoparticles supported on carbon nanotube carpets: influence of surface functionalization

Silver nanoparticles supported on carbon nanotube carpets: influence of surface functionalization

Circulating microRNAs in oncogenic viral infections: potential diagnostic biomarkers

Three-Dimensional Coating of Porous Activated Carbons with Silver Nanoparticles and its Scale-up Design for Plant Disease Management in Greenhouses

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